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2. Catadioptric system - Wikipedia

   en.wikipedia.org/wiki/Catadioptric_system

   Léon Foucault developed a catadioptric microscope in 1859 to counteract aberrations of using a lens to image objects at high power. [2] In 1876 a French engineer, A. Mangin, invented what has come to be called the Mangin mirror, a concave glass reflector with the silver surface on the rear side of the glass. The two surfaces of the reflector ...

3. Newton's reflector - Wikipedia

   en.wikipedia.org/wiki/Newton's_reflector

   Newton describes a telescope with an objective concave primary mirror diameter of 2 inches (50 mm) 0.3 of an inch thick, ground to fit a sphere that was 25 inches in diameter giving it a radius of 12.5 inches and a focal length of 6.25 inches (158 mm). The mirror was aperture reduced to an effective aperture of 1.3 inches by placing a disk with ...

4. Speculum metal - Wikipedia

   en.wikipedia.org/wiki/Speculum_metal

   The era of the large glass-mirror reflector had begun, with telescopes such as Andrew Ainslie Common's 1879 36-inch (91 cm) and 1887 60-inch (152 cm) reflectors built at Ealing, and the first of the "modern" large glass-mirror research reflectors, 60-inch (150 cm) Mount Wilson Observatory Hale Telescope of 1908, the 100-inch (2.5 m) Mount ...

5. Output coupler - Wikipedia

   en.wikipedia.org/wiki/Output_coupler

   A dielectric output-coupler for a dye laser. Centered at 550 nm, the left photo shows its high reflectance to yellow light and its high transmittance to red and blue light. The right photo shows it reflecting 75% of a laser beam and transmitting 25%, although the beam appears brighter when moving toward the observer than when moving away.

6. Corner reflector - Wikipedia

   en.wikipedia.org/wiki/Corner_reflector

   A corner reflector is a retroreflector consisting of three mutually perpendicular, intersecting flat reflective surfaces. It reflects waves incident from any direction directly towards the source, but translated .

7. More bad news for Miami? CFP chair says committee won't ... - AOL

   www.aol.com/sports/more-bad-news-miami-cfp...

   By that reasoning, Miami’s playoff hopes are toast barring an unexpected blowout loss for a team like Penn State or Georgia in their conference title games on Saturday that somehow drops one or ...